Left Join Fetch Behaving Like Inner Join - spring

Question

I have a one-to-many relationship between routes and stops. In order to maintain an audit trail, my Stop entities have a "historic" boolean.
When fetching a route, I want to ignore historic stops, and so I constructed this query:
#Query("select r from Route r " +
"left join fetch r.schedules schedule " +
"left join fetch r.stops stop " +
"where r.routeId = :routeId and stop.historic = false ")
Optional<Route> findByIdLoadStops(#Param("routeId") int routeId);
This works fine when the route has non-historic stops and no stops, but when the route only has a historic stop (which shouldn't happen but I want to be able to at least handle it), it returns an empty optional as though an inner join has been performed.
When logging the JPA query created by hibernate, I can see that the query uses a left outer join.
What have I done incorrectly?
Route and Stop entities:
#Table(name = "route")
#Entity
public class Route {
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
#Column(name = "routeId", columnDefinition = "SMALLINT(5) UNSIGNED")
private int routeId;
#Column(name = "locked")
private boolean locked = false;
#OneToMany(mappedBy = "route",
cascade = CascadeType.ALL,
fetch = FetchType.LAZY)
#OrderBy("stopTime asc")
private SortedSet<Stop> stops = new TreeSet<>();
public Route() {
}
}
#Table(name = "stop", uniqueConstraints = {
#UniqueConstraint(columnNames = {"stopTime", "routeId"}),
#UniqueConstraint(columnNames = {"stopName", "routeId"})})
#Entity
public class Stop implements Comparable<Stop> {
#Id
#Column(name = "stopId")
#GeneratedValue(strategy = GenerationType.IDENTITY)
private int stopId;
#Column(name = "routeId",
columnDefinition = "SMALLINT(5)",
updatable = false, insertable = false)
private int routeId;
#ManyToOne(cascade = CascadeType.MERGE,
fetch = FetchType.LAZY)
#JoinColumn(name = "routeId")
private Route route;
#Column(name = "stopTime")
private LocalTime stopTime;
#Column(name = "stopName")
private String stopName;
#JoinColumn(name = "originalId", referencedColumnName = "stopId")
#ManyToOne(fetch = FetchType.LAZY)
private Stop originalStop = this;
#Column(name = "historic")
private boolean historic = false;
public Stop() {
}
}